Sorry for late reply.
I try to explain better (in short) the problem:
i want to create a database to store the informations about golf clubs and their members.
Each club organizes races for which information is passed through an xml file.

So my schema is:

Code:

-------------------------------------------------------------------------
-- CATEGORY Each player takes part in a race in one or more categories
-------------------------------------------------------------------------
CREATE OR REPLACE TYPE tCategoria AS OBJECT(
nome VARCHAR2(100),
nPremi INTEGER,
minHandicap INTEGER,
maxHandicap INTEGER,
age INTEGER
);
/